package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StreamUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;
    //员工登入
    @PostMapping("/login") // request获取session
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) { // 接受前端的JSON数据
        // 将页面提交的代码password进行md4加密处理
        String password=  employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //根据业面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername()); // 通过username的方式查找数据库
        Employee emp = employeeService.getOne(queryWrapper);

        // 如果没有查询到则返回登陆失败的结果
        if (emp == null) {
            return R.error("登入失败");
        }

        // 密码比对，如果不一致则返回登陆失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登陆失败");
        }

        //查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("员工已禁用");
        }

        // 登入成功将员工id存入Session并返回登陆成功的结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp); // 像前端返回JSON数据
    }

    // 用户退出
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        // 清理Session中保存的当前登陆员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    // 新增员工
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) { // @RequestBody接受前端JSON数据
        log.info("新增员工， 员工信息： {}", employee.toString());

        // 设置初始密码123456, 进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        // 获得当前用户的id， 完善从前端获取的信息
        /*Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/
        employeeService.save(employee); // 将数据存入数据库
        return R.success("新增员工成功");
    }

    // 员工信息分页查询
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page = {}, pageSize = {}, name = {}", page, pageSize, name);

        // 构造分页构造器
        Page pageInfo = new Page<>(page, pageSize); // 查第page页，第pageSize条
        // 构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        // 添加一个过滤条件

        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name); // 创建一个Employee并调用它的getName方法， 作用为当name不为bull, 储存name方法
        // 添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime); // 通过更新时间排序
        // 执行查询
        employeeService.page(pageInfo, queryWrapper); // 自动封装给Page并赋值发送给前端
        return R.success(pageInfo);
    }

    // 根据ID修改员工信息
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        log.info(employee.toString());

        long id = Thread.currentThread().getId();
        log.info("线程id为： {}", id);
       /* Long empId = (Long) request.getSession().getAttribute("employee");*/

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    // 根据id查询员工信息
    @GetMapping("/{id}") //@PathVariable作用为将id传入地址中
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id查询员工信息。。。。。");
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息。。。。。");
    }
}
